B.E. Eligibility

You can seek admission through any mode on the basis of a single application form, subject to fulfilment of eligibility criteria. Mode 1 70% seats on the basis of JEE (Main)-2019/NEET-2019 rankings
Mode 2 30% seats on the basis of 10+2 PCM/PCB scores
For more details please checkhttps://admissions.thapar.edu/online-application-form.php?_ga=2.61410220.1049489634.1552475651-109155482.1542883253
Their applications are open. Hope check it out.

For lateral entry there is no entrance exam. You can apply for admission and according to your percentile in Diploma you will get admission there.
Good luck.

Last year's cut-off for BE in electronics and telecommunication engineering in DJ Sanghvi College in the last list was 105 for open category and 99 for Gujarati minority.

No, you can't get direct admission. For admission, you need to fill up the application form available on their website. Then, they will release the merit list, and on the basis of merit lists admission is granted. Your marks are good. Just wait for the notification. Best of luck.

Eligibility for admission is candidate must have passed Diploma in the relevant field of engineering from a recognized university.
Check the link below for more details :
https://www.shiksha.com/b-tech/course/b-e-in-computer-science-and-engineering-lateral-entry-ramaiah-institute-of-technology-m-s-r-nagar-bangalore-270530

You must have an aggregate percentage of 45% for General/OBC Category and 40% for ST/SC category

Yes, chances are there because you have scored very good percentage in JEE Mains. I hope the best and do well.

Only through 12%, you cannot get this college if you have JEE Mains good score card, then you can get this college.
https://www.shiksha.com/college/dr-d-y-patil-institute-of-engineering-management-research-dypiemr-akurdi-pune-35068

It is a little bit difficult to get your seat in the desired college with this percentile. So, just give a try in the counselling.

For CS branch, fee would be not greater than 15 Lakhs for 4 years. Yes, admission depends on 12th percentage as many colleges have the minimum eligibility criteria of 12th marks.